What is an I-MR Chart?

Minitab Masterclass: Part 02 (Master Top 7 Control Charts) How to create an I-MR Chart on Minitab?
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Transcript

Hey everyone, welcome to this lecture, what is an eye Mr chart? I m r is an acronym of individual moving range chart. This chart is used when your data is continuous and the subgroup size is equal to one. Some examples of this situation are automated inspection and measurement technology is used and every unit manufacturer is analyzed. So, there is no basis for rational subgrouping. The production rate is very slow, and it is inconvenient to allow more than one sample size to accumulate before analysis.

Repeat measurements on the process differ only environmental or analytical errors, such as testing of perishable food items. multiple measurements are taken on the same unit of product. This is how the IMR chart looks In the situations that I had just described, the control chart for individual units is useful. In this control chart, you're also using the moving range of two successive observations as the basis of estimating the process variation. With that, let us now learn how to create an IMR chart on Minitab.

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